Global ble_conn_handle: Replaced by device_context_t. After calling bleConnect, the bleConnStateChangedCallback callback will write back the BLE connection handle.
Struct bleCallbackVars_t: Mostly replaced by device_context_t and device_context_array_t.
Global callback_vars: Mostly replaced by devices_context.
Global gNo_svc: Replaced by device_context_t. When calling bleGetDatabase, the it will set gattdb_out and gattdb_count_out for the callback to write out the data directly to the pointers provided by the caller.
Global pGgatt_service: Replaced by device_context_t. When calling bleGetDatabase, the it will set gattdb_out and gattdb_count_out for the callback to write out the data directly to the pointers provided by the caller.